![Ondrej Zary](/assets/img/avatar_default.png)
Add automatic probing of ports 0x284 and 0x384 to radio-sf16fmi if no card is found using PnP. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
412 lines
9.7 KiB
C
412 lines
9.7 KiB
C
/* SF16-FMI and SF16-FMP radio driver for Linux radio support
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* heavily based on rtrack driver...
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* (c) 1997 M. Kirkwood
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* (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
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*
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* Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>
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* Made working and cleaned up functions <mikael.hedin@irf.se>
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* Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
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*
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* Notes on the hardware
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*
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* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
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* No volume control - only mute/unmute - you have to use line volume
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* control on SB-part of SF16-FMI/SF16-FMP
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*
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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*/
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#include <linux/version.h>
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#include <linux/kernel.h> /* __setup */
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#include <linux/module.h> /* Modules */
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#include <linux/init.h> /* Initdata */
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#include <linux/ioport.h> /* request_region */
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#include <linux/delay.h> /* udelay */
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#include <linux/isapnp.h>
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#include <linux/mutex.h>
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#include <linux/videodev2.h> /* kernel radio structs */
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#include <linux/io.h> /* outb, outb_p */
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
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MODULE_DESCRIPTION("A driver for the SF16-FMI and SF16-FMP radio.");
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MODULE_LICENSE("GPL");
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static int io = -1;
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static int radio_nr = -1;
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module_param(io, int, 0);
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MODULE_PARM_DESC(io, "I/O address of the SF16-FMI or SF16-FMP card (0x284 or 0x384)");
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module_param(radio_nr, int, 0);
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#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
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struct fmi
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{
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struct v4l2_device v4l2_dev;
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struct video_device vdev;
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int io;
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bool mute;
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unsigned long curfreq; /* freq in kHz */
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struct mutex lock;
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};
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static struct fmi fmi_card;
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static struct pnp_dev *dev;
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bool pnp_attached;
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/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
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/* It is only useful to give freq in interval of 800 (=0.05Mhz),
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* other bits will be truncated, e.g 92.7400016 -> 92.7, but
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* 92.7400017 -> 92.75
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*/
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#define RSF16_ENCODE(x) ((x) / 800 + 214)
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#define RSF16_MINFREQ (87 * 16000)
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#define RSF16_MAXFREQ (108 * 16000)
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static void outbits(int bits, unsigned int data, int io)
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{
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while (bits--) {
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if (data & 1) {
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outb(5, io);
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udelay(6);
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outb(7, io);
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udelay(6);
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} else {
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outb(1, io);
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udelay(6);
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outb(3, io);
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udelay(6);
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}
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data >>= 1;
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}
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}
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static inline void fmi_mute(struct fmi *fmi)
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{
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mutex_lock(&fmi->lock);
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outb(0x00, fmi->io);
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mutex_unlock(&fmi->lock);
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}
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static inline void fmi_unmute(struct fmi *fmi)
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{
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mutex_lock(&fmi->lock);
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outb(0x08, fmi->io);
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mutex_unlock(&fmi->lock);
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}
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static inline int fmi_setfreq(struct fmi *fmi, unsigned long freq)
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{
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mutex_lock(&fmi->lock);
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fmi->curfreq = freq;
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outbits(16, RSF16_ENCODE(freq), fmi->io);
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outbits(8, 0xC0, fmi->io);
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msleep(143); /* was schedule_timeout(HZ/7) */
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mutex_unlock(&fmi->lock);
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if (!fmi->mute)
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fmi_unmute(fmi);
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return 0;
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}
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static inline int fmi_getsigstr(struct fmi *fmi)
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{
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int val;
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int res;
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mutex_lock(&fmi->lock);
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val = fmi->mute ? 0x00 : 0x08; /* mute/unmute */
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outb(val, fmi->io);
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outb(val | 0x10, fmi->io);
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msleep(143); /* was schedule_timeout(HZ/7) */
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res = (int)inb(fmi->io + 1);
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outb(val, fmi->io);
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mutex_unlock(&fmi->lock);
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return (res & 2) ? 0 : 0xFFFF;
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}
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
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strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
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strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
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v->version = RADIO_VERSION;
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v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct fmi *fmi = video_drvdata(file);
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if (v->index > 0)
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return -EINVAL;
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strlcpy(v->name, "FM", sizeof(v->name));
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = RSF16_MINFREQ;
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v->rangehigh = RSF16_MAXFREQ;
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v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
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v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
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v->audmode = V4L2_TUNER_MODE_STEREO;
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v->signal = fmi_getsigstr(fmi);
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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return v->index ? -EINVAL : 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct fmi *fmi = video_drvdata(file);
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if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
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return -EINVAL;
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if (f->frequency < RSF16_MINFREQ ||
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f->frequency > RSF16_MAXFREQ)
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return -EINVAL;
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/* rounding in steps of 800 to match the freq
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that will be used */
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fmi_setfreq(fmi, (f->frequency / 800) * 800);
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct fmi *fmi = video_drvdata(file);
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if (f->tuner != 0)
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return -EINVAL;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = fmi->curfreq;
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return 0;
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}
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static int vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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switch (qc->id) {
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case V4L2_CID_AUDIO_MUTE:
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return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
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}
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return -EINVAL;
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}
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static int vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct fmi *fmi = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = fmi->mute;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct fmi *fmi = video_drvdata(file);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (ctrl->value)
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fmi_mute(fmi);
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else
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fmi_unmute(fmi);
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fmi->mute = ctrl->value;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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{
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return i ? -EINVAL : 0;
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}
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static int vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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a->index = 0;
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strlcpy(a->name, "Radio", sizeof(a->name));
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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return a->index ? -EINVAL : 0;
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}
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static const struct v4l2_file_operations fmi_fops = {
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.owner = THIS_MODULE,
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.ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
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.vidioc_querycap = vidioc_querycap,
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.vidioc_g_tuner = vidioc_g_tuner,
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.vidioc_s_tuner = vidioc_s_tuner,
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.vidioc_g_audio = vidioc_g_audio,
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.vidioc_s_audio = vidioc_s_audio,
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.vidioc_g_input = vidioc_g_input,
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.vidioc_s_input = vidioc_s_input,
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_queryctrl = vidioc_queryctrl,
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.vidioc_g_ctrl = vidioc_g_ctrl,
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.vidioc_s_ctrl = vidioc_s_ctrl,
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};
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/* ladis: this is my card. does any other types exist? */
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static struct isapnp_device_id id_table[] __devinitdata = {
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{ ISAPNP_ANY_ID, ISAPNP_ANY_ID,
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ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
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{ ISAPNP_CARD_END, },
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};
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MODULE_DEVICE_TABLE(isapnp, id_table);
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static int __init isapnp_fmi_probe(void)
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{
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int i = 0;
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while (id_table[i].card_vendor != 0 && dev == NULL) {
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dev = pnp_find_dev(NULL, id_table[i].vendor,
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id_table[i].function, NULL);
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i++;
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}
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if (!dev)
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return -ENODEV;
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if (pnp_device_attach(dev) < 0)
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return -EAGAIN;
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if (pnp_activate_dev(dev) < 0) {
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printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
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pnp_device_detach(dev);
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return -ENOMEM;
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}
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if (!pnp_port_valid(dev, 0)) {
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pnp_device_detach(dev);
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return -ENODEV;
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}
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i = pnp_port_start(dev, 0);
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printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
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return i;
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}
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static int __init fmi_init(void)
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{
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struct fmi *fmi = &fmi_card;
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struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
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int res, i;
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int probe_ports[] = { 0, 0x284, 0x384 };
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if (io < 0) {
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for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
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io = probe_ports[i];
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if (io == 0) {
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io = isapnp_fmi_probe();
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if (io < 0)
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continue;
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pnp_attached = 1;
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}
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if (!request_region(io, 2, "radio-sf16fmi")) {
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if (pnp_attached)
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pnp_device_detach(dev);
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io = -1;
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continue;
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}
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if (pnp_attached ||
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((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
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break;
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release_region(io, 2);
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io = -1;
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}
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} else {
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if (!request_region(io, 2, "radio-sf16fmi")) {
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printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
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return -EBUSY;
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}
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if (inb(io) == 0xff) {
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printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
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release_region(io, 2);
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return -ENODEV;
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}
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}
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if (io < 0) {
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printk(KERN_ERR "radio-sf16fmi: no cards found\n");
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return -ENODEV;
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}
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strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
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fmi->io = io;
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res = v4l2_device_register(NULL, v4l2_dev);
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if (res < 0) {
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release_region(fmi->io, 2);
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if (pnp_attached)
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pnp_device_detach(dev);
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v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
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return res;
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}
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strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
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fmi->vdev.v4l2_dev = v4l2_dev;
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fmi->vdev.fops = &fmi_fops;
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fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
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fmi->vdev.release = video_device_release_empty;
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video_set_drvdata(&fmi->vdev, fmi);
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mutex_init(&fmi->lock);
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if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_device_unregister(v4l2_dev);
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release_region(fmi->io, 2);
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if (pnp_attached)
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pnp_device_detach(dev);
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return -EINVAL;
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}
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v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
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/* mute card - prevents noisy bootups */
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fmi_mute(fmi);
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return 0;
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}
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static void __exit fmi_exit(void)
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{
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struct fmi *fmi = &fmi_card;
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video_unregister_device(&fmi->vdev);
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v4l2_device_unregister(&fmi->v4l2_dev);
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release_region(fmi->io, 2);
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if (dev && pnp_attached)
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pnp_device_detach(dev);
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}
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module_init(fmi_init);
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module_exit(fmi_exit);
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